The effect of ratio geometry based on characteristic using fluidic oscillator

This study discusses the fluidic oscillator using computational methods. The analysis was carried out in a transient state with the URANS equation. The turbulence model used is k-ω SST. The fluidic oscillator was analyzed by varying the size of the fluidic oscillator by doubling the baseline and reducing its size by half. The analysis was carried out using the magnitude velocity curve to time changes, velocity profiles, and fluid flow contours. Based on the results of the velocity analysis at two points, it can be concluded that the fluidic oscillator can produce an oscillating fluid flow with a maximum velocity of almost eight times the inlet velocity. Meanwhile, the velocity profile in the feedback channel is alternately positive and negative due to the backflow phenomenon. In the mixing chamber, an adverse velocity profile can also be found, indicating the mixing flow’s presence. Based on the magnitude velocity analysis results, it can be concluded that changing the dimensions by increasing the size of the fluidic oscillator does not produce significant changes. Meanwhile, the velocity profile on the feedback channel shows a significant change in model 3. The velocity contour shows that at t=4 s, the fluid from fluidic oscillator model 1 has lost its oscillator effect. However, this is not the case with the model 2 and 3 fluidic oscillators.